listen carefully in these louisiana woods and you'll hear wind and rain and an occasional bird. there's one thing you will not hear. the croaking of the dusky gopher frog. >> it's a species that inhabited the gulf coast from the mobile basin over into louisiana historically. over the years through the habitat destruction and disease its population has been reduced significantly. >> in 2001 the u.s. fish and wildlife service declared it an endangered species. >> at that point the center for biological diversity sued. and said, you have got to designate critical habitat, the frog is losing habitat too quickly. >> and so they did, 6,500 acres are designated including these 1500 acres in louisiana. but there are a few problems. the frogs has not been spotted anywhere in the entire state for nearly 50 years. >> population is less than 100 individuals is what they're estimating. and it is very picky about where it breeds. >> all 100 of those frogs are here, in mississippi. >> it was only one breeding pond known to exist, which was in harrison county, mississippi, and it had not been s